[FIX] product_email_template: use proper parameters
[FIX] product_email_template: use proper parameters

`custom_layout` should be set as a context key, otherwise it crashes at
creation because of non-existing field.

opw-2146695
opw-2149726

closes odoo/odoo#41238

X-original-commit: f9837eb08a316965057fe239f434b1c6d5c0196c
Signed-off-by: Nicolas Martinelli (nim) <771435c469f83f6aa9c405ac5e1ed06314a94f2d@odoo.com>

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo